The World Health Organization published a report in October that classifies red meat and processed meat as carcinogenic to humans. Both substances fall into the same classification as tobacco and asbestos. Further description of the statement is posted below from a Q&A report.

8. Processed meat was classified as Group 1, carcinogenic to humans. What does this mean?

This category is used when there is sufficient evidence of carcinogenicity in humans. In other words, there is convincing evidence that the agent causes cancer. The evaluation is usually based on epidemiological studies showing the development of cancer in exposed humans.In the case of processed meat, this classification is based on sufficient evidence from epidemiological studies that eating processed meat causes colorectal cancer. Source

The Q&A continues to explain that within the Group 1 classification, there are still different levels of risk to cancer for each substance. However, the definition of Group 1 is to inform people that the risks of chronic illness are heightened when exposed to those substances. The most likely oncological disease linked to red meat consumption was colorectal cancer. The results of the epidemiological studies are consistent with a 2002 report by WHO recommending less meat in human diets to prevent chronic illness.

It's not hard to replace meat in a diet with a variety of plant-based options full of flavor and with a range of textures. Plant-based ingredients have been shown to halt the initiation and promotion of cancer and potentially reverse problems associated with red meat consumption as described by the WHO report. Start with one meal a week and then try two. Healthy food can be enjoyed greatly and may reduce chances of long term illness.